Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1987 insertions, 0 deletions

diff --git a/drivers/net/tokenring/ibmtr.c b/drivers/net/tokenring/ibmtr.c
new file mode 100644
index 00000000000..c098863bdd9
--- /dev/null
+++ b/drivers/net/tokenring/ibmtr.c
@@ -0,0 +1,1987 @@
+/* ibmtr.c:  A shared-memory IBM Token Ring 16/4 driver for linux
+ *
+ *	Written 1993 by Mark Swanson and Peter De Schrijver.
+ *	This software may be used and distributed according to the terms
+ *	of the GNU General Public License, incorporated herein by reference.
+ *
+ *	This device driver should work with Any IBM Token Ring Card that does
+ *	not use DMA.
+ *
+ *	I used Donald Becker's (becker@scyld.com) device driver work
+ *	as a base for most of my initial work.
+ *
+ *	Changes by Peter De Schrijver
+ *		(Peter.Deschrijver@linux.cc.kuleuven.ac.be) :
+ *
+ *	+ changed name to ibmtr.c in anticipation of other tr boards.
+ *	+ changed reset code and adapter open code.
+ *	+ added SAP open code.
+ *	+ a first attempt to write interrupt, transmit and receive routines.
+ *
+ *	Changes by David W. Morris (dwm@shell.portal.com) :
+ *	941003 dwm: - Restructure tok_probe for multiple adapters, devices.
+ *	+ Add comments, misc reorg for clarity.
+ *	+ Flatten interrupt handler levels.
+ *
+ *	Changes by Farzad Farid (farzy@zen.via.ecp.fr)
+ *	and Pascal Andre (andre@chimay.via.ecp.fr) (March 9 1995) :
+ *	+ multi ring support clean up.
+ *	+ RFC1042 compliance enhanced.
+ *
+ *	Changes by Pascal Andre (andre@chimay.via.ecp.fr) (September 7 1995) :
+ *	+ bug correction in tr_tx
+ *	+ removed redundant information display
+ *	+ some code reworking
+ *
+ *	Changes by Michel Lespinasse (walken@via.ecp.fr),
+ *	Yann Doussot (doussot@via.ecp.fr) and Pascal Andre (andre@via.ecp.fr)
+ *	(February 18, 1996) :
+ *	+ modified shared memory and mmio access port the driver to
+ *	  alpha platform (structure access -> readb/writeb)
+ *
+ *	Changes by Steve Kipisz (bungy@ibm.net or kipisz@vnet.ibm.com)
+ *	(January 18 1996):
+ *	+ swapped WWOR and WWCR in ibmtr.h
+ *	+ moved some init code from tok_probe into trdev_init.  The
+ *	  PCMCIA code can call trdev_init to complete initializing
+ *	  the driver.
+ *	+ added -DPCMCIA to support PCMCIA
+ *	+ detecting PCMCIA Card Removal in interrupt handler.  If
+ *	  ISRP is FF, then a PCMCIA card has been removed
+ *        10/2000 Burt needed a new method to avoid crashing the OS
+ *
+ *	Changes by Paul Norton (pnorton@cts.com) :
+ *	+ restructured the READ.LOG logic to prevent the transmit SRB
+ *	  from being rudely overwritten before the transmit cycle is
+ *	  complete. (August 15 1996)
+ *	+ completed multiple adapter support. (November 20 1996)
+ *	+ implemented csum_partial_copy in tr_rx and increased receive 
+ *        buffer size and count. Minor fixes. (March 15, 1997)
+ *
+ *	Changes by Christopher Turcksin <wabbit@rtfc.demon.co.uk>
+ *	+ Now compiles ok as a module again.
+ *
+ *	Changes by Paul Norton (pnorton@ieee.org) :
+ *      + moved the header manipulation code in tr_tx and tr_rx to
+ *        net/802/tr.c. (July 12 1997)
+ *      + add retry and timeout on open if cable disconnected. (May 5 1998)
+ *      + lifted 2000 byte mtu limit. now depends on shared-RAM size.
+ *        May 25 1998)
+ *      + can't allocate 2k recv buff at 8k shared-RAM. (20 October 1998)
+ *
+ *      Changes by Joel Sloan (jjs@c-me.com) :
+ *      + disable verbose debug messages by default - to enable verbose
+ *	  debugging, edit the IBMTR_DEBUG_MESSAGES define below 
+ *	
+ *	Changes by Mike Phillips <phillim@amtrak.com> :
+ *	+ Added extra #ifdef's to work with new PCMCIA Token Ring Code.
+ *	  The PCMCIA code now just sets up the card so it can be recognized
+ *        by ibmtr_probe. Also checks allocated memory vs. on-board memory
+ *	  for correct figure to use.
+ *
+ *	Changes by Tim Hockin (thockin@isunix.it.ilstu.edu) :
+ *	+ added spinlocks for SMP sanity (10 March 1999)
+ *
+ *      Changes by Jochen Friedrich to enable RFC1469 Option 2 multicasting
+ *      i.e. using functional address C0 00 00 04 00 00 to transmit and 
+ *      receive multicast packets.
+ *
+ *      Changes by Mike Sullivan (based on original sram patch by Dave Grothe
+ *      to support windowing into on adapter shared ram.
+ *      i.e. Use LANAID to setup a PnP configuration with 16K RAM. Paging
+ *      will shift this 16K window over the entire available shared RAM.
+ *
+ *      Changes by Peter De Schrijver (p2@mind.be) :
+ *      + fixed a problem with PCMCIA card removal
+ *
+ *      Change by Mike Sullivan et al.:
+ *      + added turbo card support. No need to use lanaid to configure
+ *      the adapter into isa compatiblity mode.
+ *
+ *      Changes by Burt Silverman to allow the computer to behave nicely when
+ *	a cable is pulled or not in place, or a PCMCIA card is removed hot.
+ */
+
+/* change the define of IBMTR_DEBUG_MESSAGES to a nonzero value 
+in the event that chatty debug messages are desired - jjs 12/30/98 */
+
+#define IBMTR_DEBUG_MESSAGES 0
+
+#include <linux/module.h>
+
+#ifdef PCMCIA		/* required for ibmtr_cs.c to build */
+#undef MODULE		/* yes, really */
+#undef ENABLE_PAGING
+#else
+#define ENABLE_PAGING 1		
+#endif
+
+#define FALSE 0
+#define TRUE (!FALSE)
+
+/* changes the output format of driver initialization */
+#define TR_VERBOSE	0
+
+/* some 95 OS send many non UI frame; this allow removing the warning */
+#define TR_FILTERNONUI	1
+
+#include <linux/ioport.h>
+#include <linux/netdevice.h>
+#include <linux/ip.h>
+#include <linux/trdevice.h>
+#include <linux/ibmtr.h>
+
+#include <net/checksum.h>
+
+#include <asm/io.h>
+
+#define DPRINTK(format, args...) printk("%s: " format, dev->name , ## args)
+#define DPRINTD(format, args...) DummyCall("%s: " format, dev->name , ## args)
+
+/* version and credits */
+#ifndef PCMCIA
+static char version[] __initdata =
+    "\nibmtr.c: v1.3.57   8/ 7/94 Peter De Schrijver and Mark Swanson\n"
+    "         v2.1.125 10/20/98 Paul Norton    <pnorton@ieee.org>\n"
+    "         v2.2.0   12/30/98 Joel Sloan     <jjs@c-me.com>\n"
+    "         v2.2.1   02/08/00 Mike Sullivan  <sullivam@us.ibm.com>\n" 
+    "         v2.2.2   07/27/00 Burt Silverman <burts@us.ibm.com>\n" 
+    "         v2.4.0   03/01/01 Mike Sullivan <sullivan@us.ibm.com>\n";
+#endif
+
+/* this allows displaying full adapter information */
+
+char *channel_def[] __devinitdata = { "ISA", "MCA", "ISA P&P" };
+
+static char pcchannelid[] __devinitdata = {
+	0x05, 0x00, 0x04, 0x09,
+	0x04, 0x03, 0x04, 0x0f,
+	0x03, 0x06, 0x03, 0x01,
+	0x03, 0x01, 0x03, 0x00,
+	0x03, 0x09, 0x03, 0x09,
+	0x03, 0x00, 0x02, 0x00
+};
+
+static char mcchannelid[] __devinitdata =  {
+	0x04, 0x0d, 0x04, 0x01,
+	0x05, 0x02, 0x05, 0x03,
+	0x03, 0x06, 0x03, 0x03,
+	0x05, 0x08, 0x03, 0x04,
+	0x03, 0x05, 0x03, 0x01,
+	0x03, 0x08, 0x02, 0x00
+};
+
+char __devinit *adapter_def(char type)
+{
+	switch (type) {
+	case 0xF: return "PC Adapter | PC Adapter II | Adapter/A";
+	case 0xE: return "16/4 Adapter | 16/4 Adapter/A (long)";
+	case 0xD: return "16/4 Adapter/A (short) | 16/4 ISA-16 Adapter";
+	case 0xC: return "Auto 16/4 Adapter";
+	default: return "adapter (unknown type)";
+	};
+};
+
+#define TRC_INIT 0x01		/*  Trace initialization & PROBEs */
+#define TRC_INITV 0x02		/*  verbose init trace points     */
+unsigned char ibmtr_debug_trace = 0;
+
+static int 	ibmtr_probe(struct net_device *dev);
+static int	ibmtr_probe1(struct net_device *dev, int ioaddr);
+static unsigned char get_sram_size(struct tok_info *adapt_info);
+static int 	trdev_init(struct net_device *dev);
+static int 	tok_open(struct net_device *dev);
+static int 	tok_init_card(struct net_device *dev);
+void 		tok_open_adapter(unsigned long dev_addr);
+static void 	open_sap(unsigned char type, struct net_device *dev);
+static void 	tok_set_multicast_list(struct net_device *dev);
+static int 	tok_send_packet(struct sk_buff *skb, struct net_device *dev);
+static int 	tok_close(struct net_device *dev);
+irqreturn_t tok_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static void 	initial_tok_int(struct net_device *dev);
+static void 	tr_tx(struct net_device *dev);
+static void 	tr_rx(struct net_device *dev);
+void 		ibmtr_reset_timer(struct timer_list*tmr,struct net_device *dev);
+static void	tok_rerun(unsigned long dev_addr);
+void 		ibmtr_readlog(struct net_device *dev);
+static struct 	net_device_stats *tok_get_stats(struct net_device *dev);
+int 		ibmtr_change_mtu(struct net_device *dev, int mtu);
+static void	find_turbo_adapters(int *iolist);
+
+static int ibmtr_portlist[IBMTR_MAX_ADAPTERS+1] __devinitdata = {
+	0xa20, 0xa24, 0, 0, 0
+};
+static int __devinitdata turbo_io[IBMTR_MAX_ADAPTERS] = {0};
+static int __devinitdata turbo_irq[IBMTR_MAX_ADAPTERS] = {0};
+static int __devinitdata turbo_searched = 0;
+
+#ifndef PCMCIA
+static __u32 ibmtr_mem_base __initdata = 0xd0000;
+#endif
+
+static void __devinit PrtChanID(char *pcid, short stride)
+{
+	short i, j;
+	for (i = 0, j = 0; i < 24; i++, j += stride)
+		printk("%1x", ((int) pcid[j]) & 0x0f);
+	printk("\n");
+}
+
+static void __devinit HWPrtChanID(void __iomem *pcid, short stride)
+{
+	short i, j;
+	for (i = 0, j = 0; i < 24; i++, j += stride)
+		printk("%1x", ((int) readb(pcid + j)) & 0x0f);
+	printk("\n");
+}
+
+/* We have to ioremap every checked address, because isa_readb is 
+ * going away. 
+ */
+
+static void __devinit find_turbo_adapters(int *iolist)
+{
+	int ram_addr;
+	int index=0;
+	void __iomem *chanid;
+	int found_turbo=0;
+	unsigned char *tchanid, ctemp;
+	int i, j;
+	unsigned long jif;
+	void __iomem *ram_mapped ;   
+
+	if (turbo_searched == 1) return;
+	turbo_searched=1;
+	for (ram_addr=0xC0000; ram_addr < 0xE0000; ram_addr+=0x2000) {
+
+		__u32 intf_tbl=0;
+
+		found_turbo=1;
+		ram_mapped = ioremap((u32)ram_addr,0x1fff) ; 
+		if (ram_mapped==NULL) 
+ 			continue ; 
+		chanid=(CHANNEL_ID + ram_mapped);
+		tchanid=pcchannelid;
+		ctemp=readb(chanid) & 0x0f;
+		if (ctemp != *tchanid) continue;
+		for (i=2,j=1; i<=46; i=i+2,j++) {
+			if ((readb(chanid+i) & 0x0f) != tchanid[j]){
+				found_turbo=0;
+				break;
+			}
+		}
+		if (!found_turbo) continue;
+
+		writeb(0x90, ram_mapped+0x1E01);
+		for(i=2; i<0x0f; i++) {
+			writeb(0x00, ram_mapped+0x1E01+i);
+		}
+		writeb(0x00, ram_mapped+0x1E01);
+		for(jif=jiffies+TR_BUSY_INTERVAL; time_before_eq(jiffies,jif););
+		intf_tbl=ntohs(readw(ram_mapped+ACA_OFFSET+ACA_RW+WRBR_EVEN));
+		if (intf_tbl) {
+#if IBMTR_DEBUG_MESSAGES
+			printk("ibmtr::find_turbo_adapters, Turbo found at "
+				"ram_addr %x\n",ram_addr);
+			printk("ibmtr::find_turbo_adapters, interface_table ");
+			for(i=0; i<6; i++) {
+				printk("%x:",readb(ram_addr+intf_tbl+i));
+			}
+			printk("\n");
+#endif
+			turbo_io[index]=ntohs(readw(ram_mapped+intf_tbl+4));
+			turbo_irq[index]=readb(ram_mapped+intf_tbl+3);
+			outb(0, turbo_io[index] + ADAPTRESET);
+			for(jif=jiffies+TR_RST_TIME;time_before_eq(jiffies,jif););
+			outb(0, turbo_io[index] + ADAPTRESETREL);
+			index++;
+			continue;
+		}
+#if IBMTR_DEBUG_MESSAGES 
+		printk("ibmtr::find_turbo_adapters, ibmtr card found at"
+			" %x but not a Turbo model\n",ram_addr);
+#endif
+	iounmap(ram_mapped) ; 	
+	} /* for */
+	for(i=0; i<IBMTR_MAX_ADAPTERS; i++) {
+		if(!turbo_io[i]) break;
+		for (j=0; j<IBMTR_MAX_ADAPTERS; j++) {
+			if ( iolist[j] && iolist[j] != turbo_io[i]) continue;
+			iolist[j]=turbo_io[i];
+			break;
+		}
+	}
+}
+
+static void ibmtr_cleanup_card(struct net_device *dev)
+{
+	if (dev->base_addr) {
+		outb(0,dev->base_addr+ADAPTRESET);
+		
+		schedule_timeout(TR_RST_TIME); /* wait 50ms */
+
+		outb(0,dev->base_addr+ADAPTRESETREL);
+	}
+
+#ifndef PCMCIA
+	free_irq(dev->irq, dev);
+	release_region(dev->base_addr, IBMTR_IO_EXTENT);
+
+	{ 
+		struct tok_info *ti = (struct tok_info *) dev->priv;
+		iounmap(ti->mmio);
+		iounmap(ti->sram_virt);
+	}
+#endif		
+}
+
+int ibmtr_probe_card(struct net_device *dev)
+{
+	int err = ibmtr_probe(dev);
+	if (!err) {
+		err = register_netdev(dev);
+		if (err)
+			ibmtr_cleanup_card(dev);
+	}
+	return err;
+}
+
+/****************************************************************************
+ *	ibmtr_probe():  Routine specified in the network device structure
+ *	to probe for an IBM Token Ring Adapter.  Routine outline:
+ *	I.    Interrogate hardware to determine if an adapter exists
+ *	      and what the speeds and feeds are
+ *	II.   Setup data structures to control execution based upon
+ *	      adapter characteristics.
+ *
+ *	We expect ibmtr_probe to be called once for each device entry
+ *	which references it.
+ ****************************************************************************/
+
+static int ibmtr_probe(struct net_device *dev)
+{
+	int i;
+	int base_addr = dev->base_addr;
+
+	if (base_addr && base_addr <= 0x1ff) /* Don't probe at all. */
+		return -ENXIO;
+	if (base_addr > 0x1ff) { /* Check a single specified location.  */
+		if (!ibmtr_probe1(dev, base_addr)) return 0;
+		return -ENODEV;
+	}
+	find_turbo_adapters(ibmtr_portlist);
+	for (i = 0; ibmtr_portlist[i]; i++) {
+		int ioaddr = ibmtr_portlist[i];
+
+		if (!ibmtr_probe1(dev, ioaddr)) return 0;
+	}
+	return -ENODEV;
+}
+
+/*****************************************************************************/
+
+static int __devinit ibmtr_probe1(struct net_device *dev, int PIOaddr)
+{
+
+	unsigned char segment, intr=0, irq=0, i, j, cardpresent=NOTOK, temp=0;
+	void __iomem * t_mmio = NULL;
+	struct tok_info *ti = dev->priv;
+	void __iomem *cd_chanid;
+	unsigned char *tchanid, ctemp;
+#ifndef PCMCIA
+	unsigned char t_irq=0;
+        unsigned long timeout;
+	static int version_printed;
+#endif
+
+	/*    Query the adapter PIO base port which will return
+	 *    indication of where MMIO was placed. We also have a
+	 *    coded interrupt number.
+	 */
+	segment = inb(PIOaddr);
+	if (segment < 0x40 || segment > 0xe0) {
+		/* Out of range values so we'll assume non-existent IO device
+		 * but this is not necessarily a problem, esp if a turbo
+		 * adapter is being used.  */
+#if IBMTR_DEBUG_MESSAGES
+		DPRINTK("ibmtr_probe1(): unhappy that inb(0x%X) == 0x%X, "
+			"Hardware Problem?\n",PIOaddr,segment);
+#endif
+		return -ENODEV;
+	}
+	/*
+	 *    Compute the linear base address of the MMIO area
+	 *    as LINUX doesn't care about segments
+	 */
+	t_mmio = ioremap(((__u32) (segment & 0xfc) << 11) + 0x80000,2048);
+	if (!t_mmio) { 
+		DPRINTK("Cannot remap mmiobase memory area") ; 
+		return -ENODEV ; 
+	} 
+	intr = segment & 0x03;	/* low bits is coded interrupt # */
+	if (ibmtr_debug_trace & TRC_INIT)
+		DPRINTK("PIOaddr: %4hx seg/intr: %2x mmio base: %p intr: %d\n"
+				, PIOaddr, (int) segment, t_mmio, (int) intr);
+
+	/*
+	 *    Now we will compare expected 'channelid' strings with
+	 *    what we is there to learn of ISA/MCA or not TR card
+	 */
+#ifdef PCMCIA
+	iounmap(t_mmio);
+	t_mmio = ti->mmio;	/*BMS to get virtual address */
+	irq = ti->irq;		/*BMS to display the irq!   */
+#endif
+	cd_chanid = (CHANNEL_ID + t_mmio);	/* for efficiency */
+	tchanid = pcchannelid;
+	cardpresent = TR_ISA;	/* try ISA */
+
+	/*    Suboptimize knowing first byte different */
+	ctemp = readb(cd_chanid) & 0x0f;
+	if (ctemp != *tchanid) {	/* NOT ISA card, try MCA */
+		tchanid = mcchannelid;
+		cardpresent = TR_MCA;
+		if (ctemp != *tchanid)	/* Neither ISA nor MCA */
+			cardpresent = NOTOK;
+	}
+	if (cardpresent != NOTOK) {
+		/*       Know presumed type, try rest of ID */
+		for (i = 2, j = 1; i <= 46; i = i + 2, j++) {
+			if( (readb(cd_chanid+i)&0x0f) == tchanid[j]) continue;
+			/* match failed, not TR card */
+			cardpresent = NOTOK;
+			break;
+		}
+	}
+	/* 
+	 *    If we have an ISA board check for the ISA P&P version,
+	 *    as it has different IRQ settings 
+	 */
+	if (cardpresent == TR_ISA && (readb(AIPFID + t_mmio) == 0x0e))
+		cardpresent = TR_ISAPNP;
+	if (cardpresent == NOTOK) {	/* "channel_id" did not match, report */
+		if (!(ibmtr_debug_trace & TRC_INIT)) {
+#ifndef PCMCIA
+			iounmap(t_mmio);
+#endif
+			return -ENODEV;
+		}
+		DPRINTK( "Channel ID string not found for PIOaddr: %4hx\n",
+								PIOaddr);
+		DPRINTK("Expected for ISA: ");
+		PrtChanID(pcchannelid, 1);
+		DPRINTK("           found: ");
+/* BMS Note that this can be misleading, when hardware is flaky, because you
+   are reading it a second time here. So with my flaky hardware, I'll see my-
+   self in this block, with the HW ID matching the ISA ID exactly! */
+		HWPrtChanID(cd_chanid, 2);
+		DPRINTK("Expected for MCA: ");
+		PrtChanID(mcchannelid, 1);
+	}
+	/* Now, setup some of the pl0 buffers for this driver.. */
+	/* If called from PCMCIA, it is already set up, so no need to 
+	   waste the memory, just use the existing structure */
+#ifndef PCMCIA
+	ti->mmio = t_mmio;
+        for (i = 0; i < IBMTR_MAX_ADAPTERS; i++) {
+                if (turbo_io[i] != PIOaddr)
+			continue;
+#if IBMTR_DEBUG_MESSAGES 
+		printk("ibmtr::tr_probe1, setting PIOaddr %x to Turbo\n",
+		       PIOaddr);
+#endif
+		ti->turbo = 1;
+		t_irq = turbo_irq[i];
+        }
+#endif /* !PCMCIA */
+	ti->readlog_pending = 0;
+	init_waitqueue_head(&ti->wait_for_reset);
+
+	/* if PCMCIA, the card can be recognized as either TR_ISA or TR_ISAPNP
+	 * depending which card is inserted.	*/
+	
+#ifndef PCMCIA
+	switch (cardpresent) {
+	case TR_ISA:
+		if (intr == 0) irq = 9;	/* irq2 really is irq9 */
+		if (intr == 1) irq = 3;
+		if (intr == 2) irq = 6;
+		if (intr == 3) irq = 7;
+		ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
+		break;
+	case TR_MCA:
+		if (intr == 0) irq = 9;
+		if (intr == 1) irq = 3;
+		if (intr == 2) irq = 10;
+		if (intr == 3) irq = 11;
+		ti->global_int_enable = 0;
+		ti->adapter_int_enable = 0;
+		ti->sram_phys=(__u32)(inb(PIOaddr+ADAPTRESETREL) & 0xfe) << 12;
+		break;
+	case TR_ISAPNP:
+		if (!t_irq) {
+			if (intr == 0) irq = 9;
+			if (intr == 1) irq = 3;
+			if (intr == 2) irq = 10;
+			if (intr == 3) irq = 11;
+		} else
+			irq=t_irq;
+		timeout = jiffies + TR_SPIN_INTERVAL;
+		while (!readb(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)){
+			if (!time_after(jiffies, timeout)) continue;
+			DPRINTK( "Hardware timeout during initialization.\n");
+			iounmap(t_mmio);
+			kfree(ti);
+			return -ENODEV;
+		}
+		ti->sram_phys =
+		     ((__u32)readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_EVEN)<<12);
+		ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
+		break;
+	} /*end switch (cardpresent) */
+#endif	/*not PCMCIA */
+
+	if (ibmtr_debug_trace & TRC_INIT) {	/* just report int */
+		DPRINTK("irq=%d", irq);
+		printk(", sram_phys=0x%x", ti->sram_phys);
+		if(ibmtr_debug_trace&TRC_INITV){ /* full chat in verbose only */
+			DPRINTK(", ti->mmio=%p", ti->mmio);
+			printk(", segment=%02X", segment);
+		}
+		printk(".\n");
+	}
+
+	/* Get hw address of token ring card */
+	j = 0;
+	for (i = 0; i < 0x18; i = i + 2) {
+		/* technical reference states to do this */
+		temp = readb(ti->mmio + AIP + i) & 0x0f;
+		ti->hw_address[j] = temp;
+		if (j & 1)
+			dev->dev_addr[(j / 2)] =
+				ti->hw_address[j]+ (ti->hw_address[j - 1] << 4);
+		++j;
+	}
+	/* get Adapter type:  'F' = Adapter/A, 'E' = 16/4 Adapter II,... */
+	ti->adapter_type = readb(ti->mmio + AIPADAPTYPE);
+
+	/* get Data Rate:  F=4Mb, E=16Mb, D=4Mb & 16Mb ?? */
+	ti->data_rate = readb(ti->mmio + AIPDATARATE);
+
+	/* Get Early Token Release support?: F=no, E=4Mb, D=16Mb, C=4&16Mb */
+	ti->token_release = readb(ti->mmio + AIPEARLYTOKEN);
+
+	/* How much shared RAM is on adapter ? */
+	if (ti->turbo) {
+		ti->avail_shared_ram=127;
+	} else {
+		ti->avail_shared_ram = get_sram_size(ti);/*in 512 byte units */
+	}
+	/* We need to set or do a bunch of work here based on previous results*/
+	/* Support paging?  What sizes?:  F=no, E=16k, D=32k, C=16 & 32k */
+	ti->shared_ram_paging = readb(ti->mmio + AIPSHRAMPAGE);
+
+	/* Available DHB  4Mb size:   F=2048, E=4096, D=4464 */
+	switch (readb(ti->mmio + AIP4MBDHB)) {
+	case 0xe: ti->dhb_size4mb = 4096; break;
+	case 0xd: ti->dhb_size4mb = 4464; break;
+	default:  ti->dhb_size4mb = 2048; break;
+	}
+
+	/* Available DHB 16Mb size:  F=2048, E=4096, D=8192, C=16384, B=17960 */
+	switch (readb(ti->mmio + AIP16MBDHB)) {
+	case 0xe: ti->dhb_size16mb = 4096; break;
+	case 0xd: ti->dhb_size16mb = 8192; break;
+	case 0xc: ti->dhb_size16mb = 16384; break;
+	case 0xb: ti->dhb_size16mb = 17960; break;
+	default:  ti->dhb_size16mb = 2048; break;
+	}
+
+	/*    We must figure out how much shared memory space this adapter
+	 *    will occupy so that if there are two adapters we can fit both
+	 *    in.  Given a choice, we will limit this adapter to 32K.  The
+	 *    maximum space will will use for two adapters is 64K so if the
+	 *    adapter we are working on demands 64K (it also doesn't support
+	 *    paging), then only one adapter can be supported.  
+	 */
+
+	/*
+	 *    determine how much of total RAM is mapped into PC space 
+	 */
+	ti->mapped_ram_size= /*sixteen to onehundredtwentyeight 512byte blocks*/
+	    1<< ((readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03) + 4);
+	ti->page_mask = 0;
+	if (ti->turbo)  ti->page_mask=0xf0;
+	else if (ti->shared_ram_paging == 0xf);  /* No paging in adapter */
+	else {
+#ifdef ENABLE_PAGING
+		unsigned char pg_size = 0;
+		/* BMS:   page size: PCMCIA, use configuration register;
+		   ISAPNP, use LANAIDC config tool from www.ibm.com  */
+		switch (ti->shared_ram_paging) {
+		case 0xf:
+			break;
+		case 0xe:
+			ti->page_mask = (ti->mapped_ram_size == 32) ? 0xc0 : 0;
+			pg_size = 32;	/* 16KB page size */
+			break;
+		case 0xd:
+			ti->page_mask = (ti->mapped_ram_size == 64) ? 0x80 : 0;
+			pg_size = 64;	/* 32KB page size */
+			break;
+		case 0xc:
+			switch (ti->mapped_ram_size) {
+			case 32:
+				ti->page_mask = 0xc0;
+				pg_size = 32;
+				break;
+			case 64:
+				ti->page_mask = 0x80;
+				pg_size = 64;
+				break;
+			}
+			break;
+		default:
+			DPRINTK("Unknown shared ram paging info %01X\n",
+							ti->shared_ram_paging);
+			iounmap(t_mmio); 
+			kfree(ti);
+			return -ENODEV;
+			break;
+		} /*end switch shared_ram_paging */
+
+		if (ibmtr_debug_trace & TRC_INIT)
+			DPRINTK("Shared RAM paging code: %02X, "
+				"mapped RAM size: %dK, shared RAM size: %dK, "
+				"page mask: %02X\n:",
+				ti->shared_ram_paging, ti->mapped_ram_size / 2,
+				ti->avail_shared_ram / 2, ti->page_mask);
+#endif	/*ENABLE_PAGING */
+	}
+
+#ifndef PCMCIA
+	/* finish figuring the shared RAM address */
+	if (cardpresent == TR_ISA) {
+		static __u32 ram_bndry_mask[] =
+			{ 0xffffe000, 0xffffc000, 0xffff8000, 0xffff0000 };
+		__u32 new_base, rrr_32, chk_base, rbm;
+
+		rrr_32=readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03;
+		rbm = ram_bndry_mask[rrr_32];
+		new_base = (ibmtr_mem_base + (~rbm)) & rbm;/* up to boundary */
+		chk_base = new_base + (ti->mapped_ram_size << 9);
+		if (chk_base > (ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE)) {
+			DPRINTK("Shared RAM for this adapter (%05x) exceeds "
+			"driver limit (%05x), adapter not started.\n",
+			chk_base, ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE);
+			iounmap(t_mmio);
+			kfree(ti);
+			return -ENODEV;
+		} else { /* seems cool, record what we have figured out */
+			ti->sram_base = new_base >> 12;
+			ibmtr_mem_base = chk_base;
+		}
+	}
+	else  ti->sram_base = ti->sram_phys >> 12;
+
+	/* The PCMCIA has already got the interrupt line and the io port, 
+	   so no chance of anybody else getting it - MLP */
+	if (request_irq(dev->irq = irq, &tok_interrupt, 0, "ibmtr", dev) != 0) {
+		DPRINTK("Could not grab irq %d.  Halting Token Ring driver.\n",
+					irq);
+		iounmap(t_mmio);
+		kfree(ti);
+		return -ENODEV;
+	}
+	/*?? Now, allocate some of the PIO PORTs for this driver.. */
+	/* record PIOaddr range as busy */
+	if (!request_region(PIOaddr, IBMTR_IO_EXTENT, "ibmtr")) {
+		DPRINTK("Could not grab PIO range. Halting driver.\n");
+		free_irq(dev->irq, dev);
+		iounmap(t_mmio);
+		kfree(ti);
+		return -EBUSY;
+	}
+
+	if (!version_printed++) {
+		printk(version);
+	}
+#endif /* !PCMCIA */
+	DPRINTK("%s %s found\n",
+		channel_def[cardpresent - 1], adapter_def(ti->adapter_type));
+	DPRINTK("using irq %d, PIOaddr %hx, %dK shared RAM.\n",
+			irq, PIOaddr, ti->mapped_ram_size / 2);
+	DPRINTK("Hardware address : %02X:%02X:%02X:%02X:%02X:%02X\n",
+		dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
+		dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
+	if (ti->page_mask)
+		DPRINTK("Shared RAM paging enabled. "
+			"Page size: %uK Shared Ram size %dK\n",
+			((ti->page_mask^0xff)+1) >>2, ti->avail_shared_ram / 2);
+	else
+		DPRINTK("Shared RAM paging disabled. ti->page_mask %x\n",
+								ti->page_mask);
+
+	/* Calculate the maximum DHB we can use */
+	/* two cases where avail_shared_ram doesn't equal mapped_ram_size:
+	    1. avail_shared_ram is 127 but mapped_ram_size is 128 (typical)
+	    2. user has configured adapter for less than avail_shared_ram
+	       but is not using paging (she should use paging, I believe)
+	*/
+	if (!ti->page_mask) {
+		ti->avail_shared_ram=
+				min(ti->mapped_ram_size,ti->avail_shared_ram);
+	}
+
+	switch (ti->avail_shared_ram) {
+	case 16:		/* 8KB shared RAM */
+		ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)2048);
+		ti->rbuf_len4 = 1032;
+		ti->rbuf_cnt4=2;
+		ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)2048);
+		ti->rbuf_len16 = 1032;
+		ti->rbuf_cnt16=2;
+		break;
+	case 32:		/* 16KB shared RAM */
+		ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
+		ti->rbuf_len4 = 1032;
+		ti->rbuf_cnt4=4;
+		ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)4096);
+		ti->rbuf_len16 = 1032;	/*1024 usable */
+		ti->rbuf_cnt16=4;
+		break;
+	case 64:		/* 32KB shared RAM */
+		ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
+		ti->rbuf_len4 = 1032;
+		ti->rbuf_cnt4=6;
+		ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)10240);
+		ti->rbuf_len16 = 1032;
+		ti->rbuf_cnt16=6;
+		break;
+	case 127:		/* 63.5KB shared RAM */
+		ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
+		ti->rbuf_len4 = 1032;
+		ti->rbuf_cnt4=6;
+		ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)16384);
+		ti->rbuf_len16 = 1032;
+		ti->rbuf_cnt16=16;
+		break;
+	case 128:		/* 64KB   shared RAM */
+		ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
+		ti->rbuf_len4 = 1032;
+		ti->rbuf_cnt4=6;
+		ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)17960);
+		ti->rbuf_len16 = 1032;
+		ti->rbuf_cnt16=16;
+		break;
+	default:
+		ti->dhb_size4mb = 2048;
+		ti->rbuf_len4 = 1032;
+		ti->rbuf_cnt4=2;
+		ti->dhb_size16mb = 2048;
+		ti->rbuf_len16 = 1032;
+		ti->rbuf_cnt16=2;
+		break;
+	}
+	/* this formula is not smart enough for the paging case
+	ti->rbuf_cnt<x> = (ti->avail_shared_ram * BLOCKSZ - ADAPT_PRIVATE -
+			ARBLENGTH - SSBLENGTH - DLC_MAX_SAP * SAPLENGTH -
+			DLC_MAX_STA * STALENGTH - ti->dhb_size<x>mb * NUM_DHB -
+			SRBLENGTH - ASBLENGTH) / ti->rbuf_len<x>;
+	*/
+	ti->maxmtu16 = (ti->rbuf_len16 - 8) * ti->rbuf_cnt16  - TR_HLEN;
+	ti->maxmtu4 = (ti->rbuf_len4 - 8) * ti->rbuf_cnt4 - TR_HLEN;
+	/*BMS assuming 18 bytes of Routing Information (usually works) */
+	DPRINTK("Maximum Receive Internet Protocol MTU 16Mbps: %d, 4Mbps: %d\n",
+						     ti->maxmtu16, ti->maxmtu4);
+
+	dev->base_addr = PIOaddr;	/* set the value for device */
+	dev->mem_start = ti->sram_base << 12;
+	dev->mem_end = dev->mem_start + (ti->mapped_ram_size << 9) - 1;
+	trdev_init(dev);
+	return 0;   /* Return 0 to indicate we have found a Token Ring card. */
+}				/*ibmtr_probe1() */
+
+/*****************************************************************************/
+
+/* query the adapter for the size of shared RAM  */
+/* the function returns the RAM size in units of 512 bytes */
+
+static unsigned char __devinit get_sram_size(struct tok_info *adapt_info)
+{
+	unsigned char avail_sram_code;
+	static unsigned char size_code[] = { 0, 16, 32, 64, 127, 128 };
+	/* Adapter gives
+	   'F' -- use RRR bits 3,2
+	   'E' -- 8kb   'D' -- 16kb
+	   'C' -- 32kb  'A' -- 64KB
+	   'B' - 64KB less 512 bytes at top
+	   (WARNING ... must zero top bytes in INIT */
+
+	avail_sram_code = 0xf - readb(adapt_info->mmio + AIPAVAILSHRAM);
+	if (avail_sram_code) return size_code[avail_sram_code];
+	else		/* for code 'F', must compute size from RRR(3,2) bits */
+		return 1 <<
+		 ((readb(adapt_info->mmio+ACA_OFFSET+ACA_RW+RRR_ODD)>>2&3)+4);
+}
+
+/*****************************************************************************/
+
+static int __devinit trdev_init(struct net_device *dev)
+{
+	struct tok_info *ti = (struct tok_info *) dev->priv;
+
+	SET_PAGE(ti->srb_page);
+        ti->open_failure = NO    ;
+	dev->open = tok_open;
+	dev->stop = tok_close;
+	dev->hard_start_xmit = tok_send_packet;
+	dev->get_stats = tok_get_stats;
+	dev->set_multicast_list = tok_set_multicast_list;
+	dev->change_mtu = ibmtr_change_mtu;
+
+	return 0;
+}
+
+/*****************************************************************************/
+
+static int tok_init_card(struct net_device *dev)
+{
+	struct tok_info *ti;
+	short PIOaddr;
+	unsigned long i;
+
+	PIOaddr = dev->base_addr;
+	ti = (struct tok_info *) dev->priv;
+	/* Special processing for first interrupt after reset */
+	ti->do_tok_int = FIRST_INT;
+	/* Reset adapter */
+	writeb(~INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
+	outb(0, PIOaddr + ADAPTRESET);
+
+	current->state=TASK_UNINTERRUPTIBLE;
+	schedule_timeout(TR_RST_TIME); /* wait 50ms */
+
+	outb(0, PIOaddr + ADAPTRESETREL);
+#ifdef ENABLE_PAGING
+	if (ti->page_mask)
+		writeb(SRPR_ENABLE_PAGING,ti->mmio+ACA_OFFSET+ACA_RW+SRPR_EVEN);
+#endif
+	writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
+	i = sleep_on_timeout(&ti->wait_for_reset, 4 * HZ);
+	return i? 0 : -EAGAIN;
+}
+
+/*****************************************************************************/
+static int tok_open(struct net_device *dev)
+{
+	struct tok_info *ti = (struct tok_info *) dev->priv;
+	int i;
+
+	/*the case we were left in a failure state during a previous open */
+	if (ti->open_failure == YES) {
+		DPRINTK("Last time you were disconnected, how about now?\n");
+		printk("You can't insert with an ICS connector half-cocked.\n");
+	}
+
+	ti->open_status  = CLOSED; /* CLOSED or OPEN      */
+	ti->sap_status   = CLOSED; /* CLOSED or OPEN      */
+	ti->open_failure =     NO; /* NO     or YES       */
+	ti->open_mode    = MANUAL; /* MANUAL or AUTOMATIC */
+	/* 12/2000 not typical Linux, but we can use RUNNING to let us know when
+	the network has crapped out or cables are disconnected. Useful because
+	the IFF_UP flag stays up the whole time, until ifconfig tr0 down.
+	*/
+	dev->flags &= ~IFF_RUNNING;
+
+	ti->sram_phys &= ~1; /* to reverse what we do in tok_close */
+	/* init the spinlock */
+	spin_lock_init(&ti->lock);
+	init_timer(&ti->tr_timer);
+	
+	i = tok_init_card(dev);
+	if (i) return i;
+
+	while (1){
+		tok_open_adapter((unsigned long) dev);
+		i= interruptible_sleep_on_timeout(&ti->wait_for_reset, 25 * HZ);
+		/* sig catch: estimate opening adapter takes more than .5 sec*/
+		if (i>(245*HZ)/10) break; /* fancier than if (i==25*HZ) */
+		if (i==0) break;
+		if (ti->open_status == OPEN && ti->sap_status==OPEN) {
+			netif_start_queue(dev);
+			DPRINTK("Adapter is up and running\n");
+			return 0;
+		}
+		current->state=TASK_INTERRUPTIBLE;
+		i=schedule_timeout(TR_RETRY_INTERVAL); /* wait 30 seconds */
+		if(i!=0) break; /*prob. a signal, like the i>24*HZ case above */
+	}
+	outb(0, dev->base_addr + ADAPTRESET);/* kill pending interrupts*/
+	DPRINTK("TERMINATED via signal\n");	/*BMS useful */
+	return -EAGAIN;
+}
+
+/*****************************************************************************/
+
+#define COMMAND_OFST             0
+#define OPEN_OPTIONS_OFST        8
+#define NUM_RCV_BUF_OFST        24
+#define RCV_BUF_LEN_OFST        26
+#define DHB_LENGTH_OFST         28
+#define NUM_DHB_OFST            30
+#define DLC_MAX_SAP_OFST        32
+#define DLC_MAX_STA_OFST        33
+
+void tok_open_adapter(unsigned long dev_addr)
+{
+	struct net_device *dev = (struct net_device *) dev_addr;
+	struct tok_info *ti;
+	int i;
+
+	ti = (struct tok_info *) dev->priv;
+	SET_PAGE(ti->init_srb_page); 
+	writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD);
+	for (i = 0; i < sizeof(struct dir_open_adapter); i++)
+		writeb(0, ti->init_srb + i);
+	writeb(DIR_OPEN_ADAPTER, ti->init_srb + COMMAND_OFST);
+	writew(htons(OPEN_PASS_BCON_MAC), ti->init_srb + OPEN_OPTIONS_OFST);
+	if (ti->ring_speed == 16) {
+		writew(htons(ti->dhb_size16mb), ti->init_srb + DHB_LENGTH_OFST);
+		writew(htons(ti->rbuf_cnt16), ti->init_srb + NUM_RCV_BUF_OFST);
+		writew(htons(ti->rbuf_len16), ti->init_srb + RCV_BUF_LEN_OFST);
+	} else {
+		writew(htons(ti->dhb_size4mb), ti->init_srb + DHB_LENGTH_OFST);
+		writew(htons(ti->rbuf_cnt4), ti->init_srb + NUM_RCV_BUF_OFST);
+		writew(htons(ti->rbuf_len4), ti->init_srb + RCV_BUF_LEN_OFST);
+	}
+	writeb(NUM_DHB,		/* always 2 */ ti->init_srb + NUM_DHB_OFST);
+	writeb(DLC_MAX_SAP, ti->init_srb + DLC_MAX_SAP_OFST);
+	writeb(DLC_MAX_STA, ti->init_srb + DLC_MAX_STA_OFST);
+	ti->srb = ti->init_srb;	/* We use this one in the interrupt handler */
+	ti->srb_page = ti->init_srb_page;
+	DPRINTK("Opening adapter: Xmit bfrs: %d X %d, Rcv bfrs: %d X %d\n",
+		readb(ti->init_srb + NUM_DHB_OFST),
+		ntohs(readw(ti->init_srb + DHB_LENGTH_OFST)),
+		ntohs(readw(ti->init_srb + NUM_RCV_BUF_OFST)),
+		ntohs(readw(ti->init_srb + RCV_BUF_LEN_OFST)));
+	writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
+	writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+}
+
+/*****************************************************************************/
+
+static void open_sap(unsigned char type, struct net_device *dev)
+{
+	int i;
+	struct tok_info *ti = (struct tok_info *) dev->priv;
+
+	SET_PAGE(ti->srb_page);
+	for (i = 0; i < sizeof(struct dlc_open_sap); i++)
+		writeb(0, ti->srb + i);
+
+#define MAX_I_FIELD_OFST        14
+#define SAP_VALUE_OFST          16
+#define SAP_OPTIONS_OFST        17
+#define STATION_COUNT_OFST      18
+
+	writeb(DLC_OPEN_SAP, ti->srb + COMMAND_OFST);
+	writew(htons(MAX_I_FIELD), ti->srb + MAX_I_FIELD_OFST);
+	writeb(SAP_OPEN_IND_SAP | SAP_OPEN_PRIORITY, ti->srb+ SAP_OPTIONS_OFST);
+	writeb(SAP_OPEN_STATION_CNT, ti->srb + STATION_COUNT_OFST);
+	writeb(type, ti->srb + SAP_VALUE_OFST);
+	writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+}
+
+
+/*****************************************************************************/
+
+static void tok_set_multicast_list(struct net_device *dev)
+{
+	struct tok_info *ti = (struct tok_info *) dev->priv;
+	struct dev_mc_list *mclist;
+	unsigned char address[4];
+
+	int i;
+
+	/*BMS the next line is CRUCIAL or you may be sad when you */
+	/*BMS ifconfig tr down or hot unplug a PCMCIA card ??hownowbrowncow*/
+	if (/*BMSHELPdev->start == 0 ||*/ ti->open_status != OPEN) return;
+	address[0] = address[1] = address[2] = address[3] = 0;
+	mclist = dev->mc_list;
+	for (i = 0; i < dev->mc_count; i++) {
+		address[0] |= mclist->dmi_addr[2];
+		address[1] |= mclist->dmi_addr[3];
+		address[2] |= mclist->dmi_addr[4];